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1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
3 | * * |
4 | * Author: The ALICE Off-line Project. * |
5 | * Contributors are mentioned in the code where appropriate. * |
6 | * * |
7 | * Permission to use, copy, modify and distribute this software and its * |
8 | * documentation strictly for non-commercial purposes is hereby granted * |
9 | * without fee, provided that the above copyright notice appears in all * |
10 | * copies and that both the copyright notice and this permission notice * |
11 | * appear in the supporting documentation. The authors make no claims * |
12 | * about the suitability of this software for any purpose. It is * |
13 | * provided "as is" without express or implied warranty. * |
14 | **************************************************************************/ |
15 | |
b2a60966 |
16 | /* $Id$ */ |
17 | |
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18 | //_________________________________________________________________________ |
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19 | // Implementation version v1 of the PHOS particle identifier |
7acf6008 |
20 | // Particle identification based on the |
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21 | // - RCPV: distance from CPV recpoint to EMCA recpoint. |
22 | // - TOF |
23 | // - PCA: Principal Components Analysis.. |
24 | // The identified particle has an identification number corresponding |
25 | // to a 9 bits number: |
bc0c084c |
26 | // -Bit 0 to 2: bit set if RCPV > CpvEmcDistance (each bit corresponds |
148b2bba |
27 | // to a different efficiency-purity point of the photon identification) |
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28 | // -Bit 3 to 5: bit set if TOF < TimeGate (each bit corresponds |
148b2bba |
29 | // to a different efficiency-purity point of the photon identification) |
30 | // -Bit 6 to 9: bit set if Principal Components are |
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31 | // inside an ellipse defined by the parameters a, b, c, x0 and y0. |
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32 | // (each bit corresponds to a different efficiency-purity point of the |
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33 | // photon identification) |
34 | // The PCA (Principal components analysis) needs a file that contains |
35 | // a previous analysis of the correlations between the particles. This |
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36 | // file is $ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root. Analysis done for |
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37 | // energies between 0.5 and 100 GeV. |
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38 | // A calibrated energy is calculated. The energy of the reconstructed |
50739f15 |
39 | // cluster is corrected with the formula A + B * E + C * E^2, whose |
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40 | // parameters where obtained through the study of the reconstructed |
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41 | // energy distribution of monoenergetic photons. |
a4e98857 |
42 | // |
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43 | // All the parameters (RCPV(2 rows-3 columns),TOF(1r-3c),PCA(5r-4c) |
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44 | // and calibration(1r-3c))are stored in a file called |
45 | // $ALICE_ROOT/PHOS/Parameters.dat. Each time that AliPHOSPIDv1 is |
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46 | // initialized, this parameters are copied to a Matrix (9,4), a |
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47 | // TMatrixD object. |
7acf6008 |
48 | // |
a4e98857 |
49 | // use case: |
50739f15 |
50 | // root [0] AliPHOSPIDv1 * p = new AliPHOSPIDv1("galice1.root") |
a4e98857 |
51 | // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated |
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52 | // // reading headers from file galice1.root and create RecParticles |
53 | // TrackSegments and RecPoints are used |
54 | // // set file name for the branch RecParticles |
f0a4c9e9 |
55 | // root [1] p->ExecuteTask("deb all time") |
50739f15 |
56 | // // available options |
57 | // // "deb" - prints # of reconstructed particles |
58 | // // "deb all" - prints # and list of RecParticles |
59 | // // "time" - prints benchmarking results |
7acf6008 |
60 | // |
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61 | // root [2] AliPHOSPIDv1 * p2 = new AliPHOSPIDv1("galice1.root","v1",kTRUE) |
148b2bba |
62 | // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated |
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63 | // //Split mode. |
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64 | // root [3] p2->ExecuteTask() |
65 | // |
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66 | |
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67 | |
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68 | //*-- Author: Yves Schutz (SUBATECH) & Gines Martinez (SUBATECH) & |
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69 | // Gustavo Conesa April 2002 |
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70 | // PCA redesigned by Gustavo Conesa October 2002: |
71 | // The way of using the PCA has changed. Instead of 2 |
72 | // files with the PCA, each one with different energy ranges |
73 | // of application, we use the wide one (0.5-100 GeV), and instead |
bc0c084c |
74 | // of fixing 3 ellipses for different ranges of energy, it has been |
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75 | // studied the dependency of the ellipses parameters with the |
76 | // energy, and they are implemented in the code as a funtion |
77 | // of the energy. |
78 | // |
79 | // |
80 | // |
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81 | // --- ROOT system --- |
7acf6008 |
82 | #include "TROOT.h" |
83 | #include "TTree.h" |
84 | #include "TFile.h" |
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85 | #include "TF2.h" |
86 | #include "TFormula.h" |
87 | #include "TCanvas.h" |
88 | #include "TFolder.h" |
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89 | #include "TSystem.h" |
90 | #include "TBenchmark.h" |
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91 | #include "TMatrixD.h" |
92 | #include "TPrincipal.h" |
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93 | #include "TSystem.h" |
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94 | |
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95 | // --- Standard library --- |
96 | |
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97 | |
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98 | // --- AliRoot header files --- |
99 | |
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100 | #include "AliGenerator.h" |
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101 | #include "AliPHOS.h" |
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102 | #include "AliPHOSPIDv1.h" |
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103 | #include "AliPHOSClusterizerv1.h" |
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104 | #include "AliPHOSEmcRecPoint.h" |
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105 | #include "AliPHOSTrackSegment.h" |
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106 | #include "AliPHOSTrackSegmentMakerv1.h" |
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107 | #include "AliPHOSRecParticle.h" |
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108 | #include "AliPHOSGeometry.h" |
109 | #include "AliPHOSGetter.h" |
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110 | |
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111 | ClassImp( AliPHOSPIDv1) |
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112 | |
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113 | //____________________________________________________________________________ |
114 | AliPHOSPIDv1::AliPHOSPIDv1():AliPHOSPID() |
115 | { |
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116 | // default ctor |
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117 | |
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118 | InitParameters() ; |
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119 | fDefaultInit = kTRUE ; |
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120 | } |
121 | |
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122 | //____________________________________________________________________________ |
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123 | AliPHOSPIDv1::AliPHOSPIDv1(const AliPHOSPIDv1 & pid ):AliPHOSPID(pid) |
581354c5 |
124 | { |
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125 | // ctor |
581354c5 |
126 | InitParameters() ; |
581354c5 |
127 | Init() ; |
581354c5 |
128 | |
129 | } |
130 | |
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131 | //____________________________________________________________________________ |
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132 | AliPHOSPIDv1::AliPHOSPIDv1(const TString alirunFileName, const TString eventFolderName):AliPHOSPID(alirunFileName, eventFolderName) |
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133 | { |
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134 | //ctor with the indication on where to look for the track segments |
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135 | |
8d0f3f77 |
136 | InitParameters() ; |
2bd5457f |
137 | Init() ; |
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138 | fDefaultInit = kFALSE ; |
7acf6008 |
139 | } |
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140 | |
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141 | //____________________________________________________________________________ |
142 | AliPHOSPIDv1::~AliPHOSPIDv1() |
143 | { |
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144 | // dtor |
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145 | |
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146 | delete [] fX ; // Principal input |
147 | delete [] fPPhoton ; // Photon Principal components |
148 | delete [] fPPi0 ; // Pi0 Principal components |
7acf6008 |
149 | } |
a496c46c |
150 | //____________________________________________________________________________ |
151 | const TString AliPHOSPIDv1::BranchName() const |
152 | { |
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153 | |
154 | return GetName() ; |
a496c46c |
155 | } |
156 | |
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157 | //____________________________________________________________________________ |
158 | void AliPHOSPIDv1::Init() |
159 | { |
160 | // Make all memory allocations that are not possible in default constructor |
161 | // Add the PID task to the list of PHOS tasks |
a496c46c |
162 | |
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163 | AliPHOSGetter * gime = AliPHOSGetter::Instance(GetTitle(), fEventFolderName.Data()) ; |
164 | |
165 | if ( !gime->PID() ) |
166 | gime->PostPID(this) ; |
148b2bba |
167 | } |
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168 | |
169 | //____________________________________________________________________________ |
170 | void AliPHOSPIDv1::InitParameters() |
171 | { |
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172 | // Initialize PID parameters |
8d0f3f77 |
173 | fRecParticlesInRun = 0 ; |
8d0f3f77 |
174 | fNEvent = 0 ; |
8d0f3f77 |
175 | fRecParticlesInRun = 0 ; |
9fa5f1d0 |
176 | SetParameters() ; // fill the parameters matrix from parameters file |
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177 | SetEventRange(0,-1) ; |
8d0f3f77 |
178 | } |
179 | |
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180 | //________________________________________________________________________ |
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181 | void AliPHOSPIDv1::Exec(Option_t *option) |
88cb7938 |
182 | { |
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183 | // Steering method to perform particle reconstruction and identification |
184 | // for the event range from fFirstEvent to fLastEvent. |
185 | // This range is optionally set by SetEventRange(). |
186 | // if fLastEvent=-1 (by default), then process events until the end. |
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187 | |
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188 | if(strstr(option,"tim")) |
189 | gBenchmark->Start("PHOSPID"); |
190 | |
191 | if(strstr(option,"print")) { |
192 | Print() ; |
193 | return ; |
194 | } |
195 | |
196 | |
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197 | AliPHOSGetter * gime = AliPHOSGetter::Instance(GetTitle()) ; |
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198 | |
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199 | if (fLastEvent == -1) |
200 | fLastEvent = gime->MaxEvent() - 1 ; |
201 | else |
202 | fLastEvent = TMath::Min(fLastEvent,gime->MaxEvent()); |
eabde521 |
203 | Int_t nEvents = fLastEvent - fFirstEvent + 1; |
88cb7938 |
204 | |
71cee46d |
205 | Int_t ievent ; |
206 | for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) { |
88cb7938 |
207 | gime->Event(ievent,"TR") ; |
208 | if(gime->TrackSegments() && //Skip events, where no track segments made |
209 | gime->TrackSegments()->GetEntriesFast()) { |
210 | MakeRecParticles() ; |
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211 | WriteRecParticles(); |
88cb7938 |
212 | if(strstr(option,"deb")) |
213 | PrintRecParticles(option) ; |
214 | //increment the total number of rec particles per run |
215 | fRecParticlesInRun += gime->RecParticles()->GetEntriesFast() ; |
216 | } |
217 | } |
ff417097 |
218 | if(strstr(option,"deb")) |
219 | PrintRecParticles(option); |
88cb7938 |
220 | if(strstr(option,"tim")){ |
221 | gBenchmark->Stop("PHOSPID"); |
222 | Info("Exec", "took %f seconds for PID %f seconds per event", |
223 | gBenchmark->GetCpuTime("PHOSPID"), |
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224 | gBenchmark->GetCpuTime("PHOSPID")/nEvents) ; |
88cb7938 |
225 | } |
88cb7938 |
226 | Unload(); |
227 | } |
228 | |
69183710 |
229 | //____________________________________________________________________________ |
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230 | const TString AliPHOSPIDv1::GetFileNamePrincipal(TString particle) const |
148b2bba |
231 | { |
e3817e5f |
232 | //Get file name that contains the PCA for a particle ("photon or pi0") |
233 | particle.ToLower(); |
234 | TString name; |
235 | if (particle=="photon") name = fFileNamePrincipalPhoton ; |
236 | else if (particle=="pi0" ) name = fFileNamePrincipalPi0 ; |
237 | else Error("GetFileNamePrincipal","Wrong particle name: %s (choose from pi0/photon)\n",particle.Data()); |
238 | return name; |
239 | } |
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240 | |
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241 | //____________________________________________________________________________ |
fc7e2f43 |
242 | Float_t AliPHOSPIDv1::GetParameterCalibration(Int_t i) const |
e3817e5f |
243 | { |
244 | // Get the i-th parameter "Calibration" |
245 | Float_t param = 0.; |
246 | if (i>2 || i<0) |
247 | Error("GetParameterCalibration","Invalid parameter number: %d",i); |
9fa5f1d0 |
248 | else |
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249 | param = (*fParameters)(0,i); |
250 | return param; |
251 | } |
bc0c084c |
252 | |
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253 | //____________________________________________________________________________ |
fc7e2f43 |
254 | Float_t AliPHOSPIDv1::GetCalibratedEnergy(Float_t e) const |
88cb7938 |
255 | { |
256 | // It calibrates Energy depending on the recpoint energy. |
257 | // The energy of the reconstructed cluster is corrected with |
258 | // the formula A + B* E + C* E^2, whose parameters where obtained |
259 | // through the study of the reconstructed energy distribution of |
260 | // monoenergetic photons. |
261 | |
262 | Float_t p[]={0.,0.,0.}; |
263 | for (Int_t i=0; i<3; i++) p[i] = GetParameterCalibration(i); |
264 | Float_t enerec = p[0] + p[1]*e + p[2]*e*e; |
265 | return enerec ; |
266 | |
267 | } |
268 | |
e3817e5f |
269 | //____________________________________________________________________________ |
fc7e2f43 |
270 | Float_t AliPHOSPIDv1::GetParameterCpv2Emc(Int_t i, TString axis) const |
e3817e5f |
271 | { |
272 | // Get the i-th parameter "CPV-EMC distance" for the specified axis |
273 | Float_t param = 0.; |
274 | if(i>2 || i<0) |
275 | Error("GetParameterCpv2Emc","Invalid parameter number: %d",i); |
276 | else { |
277 | axis.ToLower(); |
278 | if (axis == "x") param = (*fParameters)(1,i); |
279 | else if (axis == "z") param = (*fParameters)(2,i); |
280 | else Error("GetParameterCpv2Emc","Invalid axis name: %s",axis.Data()); |
281 | } |
282 | return param; |
283 | } |
284 | |
285 | //____________________________________________________________________________ |
fc7e2f43 |
286 | Float_t AliPHOSPIDv1::GetCpv2EmcDistanceCut(TString axis, Float_t e) const |
e3817e5f |
287 | { |
88cb7938 |
288 | // Get CpvtoEmcDistance Cut depending on the cluster energy, axis and |
289 | // Purity-Efficiency point |
290 | |
291 | axis.ToLower(); |
292 | Float_t p[]={0.,0.,0.}; |
293 | for (Int_t i=0; i<3; i++) p[i] = GetParameterCpv2Emc(i,axis); |
294 | Float_t sig = p[0] + TMath::Exp(p[1] - p[2]*e); |
295 | return sig; |
e3817e5f |
296 | } |
297 | |
88cb7938 |
298 | //____________________________________________________________________________ |
fc7e2f43 |
299 | Float_t AliPHOSPIDv1::GetEllipseParameter(TString particle, TString param, Float_t e) const |
88cb7938 |
300 | { |
301 | // Calculates the parameter param of the ellipse |
e3817e5f |
302 | |
303 | particle.ToLower(); |
304 | param. ToLower(); |
88cb7938 |
305 | Float_t p[4]={0.,0.,0.,0.}; |
306 | Float_t value = 0.0; |
307 | for (Int_t i=0; i<4; i++) p[i] = GetParameterToCalculateEllipse(particle,param,i); |
308 | if (particle == "photon") { |
309 | if (param.Contains("a")) e = TMath::Min((Double_t)e,70.); |
310 | else if (param.Contains("b")) e = TMath::Min((Double_t)e,70.); |
311 | else if (param.Contains("x0")) e = TMath::Max((Double_t)e,1.1); |
312 | } |
e3817e5f |
313 | |
88cb7938 |
314 | value = p[0]/TMath::Sqrt(e) + p[1]*e + p[2]*e*e + p[3]; |
315 | return value; |
e3817e5f |
316 | } |
317 | |
318 | //_____________________________________________________________________________ |
fc7e2f43 |
319 | Float_t AliPHOSPIDv1::GetParameterPhotonBoundary (Int_t i) const |
e3817e5f |
320 | { |
321 | // Get the parameter "i" to calculate the boundary on the moment M2x |
322 | // for photons at high p_T |
323 | Float_t param = 0; |
324 | if (i>3 || i<0) |
325 | Error("GetParameterPhotonBoundary","Wrong parameter number: %d\n",i); |
326 | else |
327 | param = (*fParameters)(14,i) ; |
328 | return param; |
148b2bba |
329 | } |
e3817e5f |
330 | |
148b2bba |
331 | //____________________________________________________________________________ |
fc7e2f43 |
332 | Float_t AliPHOSPIDv1::GetParameterPi0Boundary (Int_t i) const |
e3817e5f |
333 | { |
334 | // Get the parameter "i" to calculate the boundary on the moment M2x |
335 | // for pi0 at high p_T |
336 | Float_t param = 0; |
337 | if (i>2 || i<0) |
338 | Error("GetParameterPi0Boundary","Wrong parameter number: %d\n",i); |
339 | else |
340 | param = (*fParameters)(15,i) ; |
341 | return param; |
342 | } |
148b2bba |
343 | |
e3817e5f |
344 | //____________________________________________________________________________ |
fc7e2f43 |
345 | Float_t AliPHOSPIDv1::GetParameterTimeGate(Int_t i) const |
e3817e5f |
346 | { |
88cb7938 |
347 | // Get TimeGate parameter depending on Purity-Efficiency i: |
348 | // i=0 - Low purity, i=1 - Medium purity, i=2 - High purity |
349 | Float_t param = 0.; |
e3817e5f |
350 | if(i>2 || i<0) |
88cb7938 |
351 | Error("GetParameterTimeGate","Invalid Efficiency-Purity choice %d",i); |
e3817e5f |
352 | else |
88cb7938 |
353 | param = (*fParameters)(3,i) ; |
354 | return param; |
e3817e5f |
355 | } |
356 | |
148b2bba |
357 | //_____________________________________________________________________________ |
fc7e2f43 |
358 | Float_t AliPHOSPIDv1::GetParameterToCalculateEllipse(TString particle, TString param, Int_t i) const |
88cb7938 |
359 | { |
360 | // Get the parameter "i" that is needed to calculate the ellipse |
361 | // parameter "param" for the particle "particle" ("photon" or "pi0") |
362 | |
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363 | particle.ToLower(); |
364 | param. ToLower(); |
88cb7938 |
365 | Int_t offset = -1; |
e3817e5f |
366 | if (particle == "photon") offset=0; |
367 | else if (particle == "pi0") offset=5; |
368 | else |
88cb7938 |
369 | Error("GetParameterToCalculateEllipse","Wrong particle name: %s (choose from pi0/photon)\n",particle.Data()); |
370 | |
371 | Int_t p= -1; |
372 | Float_t par = 0; |
e3817e5f |
373 | |
374 | if (param.Contains("a")) p=4+offset; |
375 | else if(param.Contains("b")) p=5+offset; |
376 | else if(param.Contains("c")) p=6+offset; |
377 | else if(param.Contains("x0"))p=7+offset; |
378 | else if(param.Contains("y0"))p=8+offset; |
12022e83 |
379 | |
88cb7938 |
380 | if (i>4 || i<0) |
381 | Error("GetParameterToCalculateEllipse", "No parameter with index", i) ; |
382 | else if (p==-1) |
383 | Error("GetParameterToCalculateEllipse", "No parameter with name %s", param.Data() ) ; |
12022e83 |
384 | else |
88cb7938 |
385 | par = (*fParameters)(p,i) ; |
386 | |
387 | return par; |
12022e83 |
388 | } |
389 | |
12022e83 |
390 | |
391 | //____________________________________________________________________________ |
8d4608b5 |
392 | Float_t AliPHOSPIDv1::GetDistance(AliPHOSEmcRecPoint * emc,AliPHOSCpvRecPoint * cpv, Option_t * axis)const |
69183710 |
393 | { |
394 | // Calculates the distance between the EMC RecPoint and the PPSD RecPoint |
148b2bba |
395 | |
88cb7938 |
396 | const AliPHOSGeometry * geom = AliPHOSGetter::Instance()->PHOSGeometry() ; |
69183710 |
397 | TVector3 vecEmc ; |
7acf6008 |
398 | TVector3 vecCpv ; |
148b2bba |
399 | if(cpv){ |
400 | emc->GetLocalPosition(vecEmc) ; |
401 | cpv->GetLocalPosition(vecCpv) ; |
2bb500e5 |
402 | |
148b2bba |
403 | if(emc->GetPHOSMod() == cpv->GetPHOSMod()){ |
404 | // Correct to difference in CPV and EMC position due to different distance to center. |
405 | // we assume, that particle moves from center |
406 | Float_t dCPV = geom->GetIPtoOuterCoverDistance(); |
407 | Float_t dEMC = geom->GetIPtoCrystalSurface() ; |
408 | dEMC = dEMC / dCPV ; |
409 | vecCpv = dEMC * vecCpv - vecEmc ; |
e3817e5f |
410 | if (axis == "X") return vecCpv.X(); |
411 | if (axis == "Y") return vecCpv.Y(); |
412 | if (axis == "Z") return vecCpv.Z(); |
413 | if (axis == "R") return vecCpv.Mag(); |
414 | } |
148b2bba |
415 | return 100000000 ; |
416 | } |
7acf6008 |
417 | return 100000000 ; |
69183710 |
418 | } |
bc0c084c |
419 | //____________________________________________________________________________ |
8d4608b5 |
420 | Int_t AliPHOSPIDv1::GetCPVBit(AliPHOSEmcRecPoint * emc,AliPHOSCpvRecPoint * cpv, Int_t effPur, Float_t e) const |
bc0c084c |
421 | { |
e3817e5f |
422 | if(effPur>2 || effPur<0) |
423 | Error("GetCPVBit","Invalid Efficiency-Purity choice %d",effPur); |
bc0c084c |
424 | |
e3817e5f |
425 | Float_t sigX = GetCpv2EmcDistanceCut("X",e); |
426 | Float_t sigZ = GetCpv2EmcDistanceCut("Z",e); |
bc0c084c |
427 | |
428 | Float_t deltaX = TMath::Abs(GetDistance(emc, cpv, "X")); |
429 | Float_t deltaZ = TMath::Abs(GetDistance(emc, cpv, "Z")); |
8d4608b5 |
430 | |
e3817e5f |
431 | if((deltaX>sigX*(effPur+1))|(deltaZ>sigZ*(effPur+1))) |
bc0c084c |
432 | return 1;//Neutral |
433 | else |
434 | return 0;//Charged |
bc0c084c |
435 | } |
69183710 |
436 | |
6ad0bfa0 |
437 | //____________________________________________________________________________ |
fc7e2f43 |
438 | Int_t AliPHOSPIDv1::GetPrincipalBit(TString particle, const Double_t* p, Int_t effPur, Float_t e)const |
148b2bba |
439 | { |
50739f15 |
440 | //Is the particle inside de PCA ellipse? |
581354c5 |
441 | |
e3817e5f |
442 | particle.ToLower(); |
443 | Int_t prinbit = 0 ; |
444 | Float_t a = GetEllipseParameter(particle,"a" , e); |
445 | Float_t b = GetEllipseParameter(particle,"b" , e); |
446 | Float_t c = GetEllipseParameter(particle,"c" , e); |
447 | Float_t x0 = GetEllipseParameter(particle,"x0", e); |
448 | Float_t y0 = GetEllipseParameter(particle,"y0", e); |
449 | |
450 | Float_t r = TMath::Power((p[0] - x0)/a,2) + |
451 | TMath::Power((p[1] - y0)/b,2) + |
452 | c*(p[0] - x0)*(p[1] - y0)/(a*b) ; |
50739f15 |
453 | //3 different ellipses defined |
e3817e5f |
454 | if((effPur==2) && (r<1./2.)) prinbit= 1; |
455 | if((effPur==1) && (r<2. )) prinbit= 1; |
456 | if((effPur==0) && (r<9./2.)) prinbit= 1; |
50739f15 |
457 | |
581354c5 |
458 | if(r<0) |
e3817e5f |
459 | Error("GetPrincipalBit", "Negative square?") ; |
1f0e7ccd |
460 | |
461 | return prinbit; |
148b2bba |
462 | |
148b2bba |
463 | } |
1f0e7ccd |
464 | //____________________________________________________________________________ |
fc7e2f43 |
465 | Int_t AliPHOSPIDv1::GetHardPhotonBit(AliPHOSEmcRecPoint * emc) const |
1f0e7ccd |
466 | { |
e3817e5f |
467 | // Set bit for identified hard photons (E > 30 GeV) |
468 | // if the second moment M2x is below the boundary |
469 | |
470 | Float_t e = emc->GetEnergy(); |
471 | if (e < 30.0) return 0; |
472 | Float_t m2x = emc->GetM2x(); |
473 | Float_t m2xBoundary = GetParameterPhotonBoundary(0) * |
474 | TMath::Exp(-TMath::Power(e-GetParameterPhotonBoundary(1),2)/2.0/ |
475 | TMath::Power(GetParameterPhotonBoundary(2),2)) + |
476 | GetParameterPhotonBoundary(3); |
61d3d6aa |
477 | //Info("GetHardPhotonBit","E=%f, m2x=%f, boundary=%f",e,m2x,m2xBoundary); |
e3817e5f |
478 | if (m2x < m2xBoundary) |
479 | return 1;// A hard photon |
480 | else |
481 | return 0;// Not a hard photon |
1f0e7ccd |
482 | } |
92f521a9 |
483 | |
e3817e5f |
484 | //____________________________________________________________________________ |
fc7e2f43 |
485 | Int_t AliPHOSPIDv1::GetHardPi0Bit(AliPHOSEmcRecPoint * emc) const |
e3817e5f |
486 | { |
487 | // Set bit for identified hard pi0 (E > 30 GeV) |
488 | // if the second moment M2x is above the boundary |
489 | |
490 | Float_t e = emc->GetEnergy(); |
491 | if (e < 30.0) return 0; |
492 | Float_t m2x = emc->GetM2x(); |
493 | Float_t m2xBoundary = GetParameterPi0Boundary(0) + |
494 | e * GetParameterPi0Boundary(1); |
61d3d6aa |
495 | //Info("GetHardPi0Bit","E=%f, m2x=%f, boundary=%f",e,m2x,m2xBoundary); |
e3817e5f |
496 | if (m2x > m2xBoundary) |
497 | return 1;// A hard pi0 |
bc0c084c |
498 | else |
e3817e5f |
499 | return 0;// Not a hard pi0 |
f0a4c9e9 |
500 | } |
e3817e5f |
501 | |
502 | //____________________________________________________________________________ |
8d4608b5 |
503 | TVector3 AliPHOSPIDv1::GetMomentumDirection(AliPHOSEmcRecPoint * emc, AliPHOSCpvRecPoint * )const |
88cb7938 |
504 | { |
505 | // Calculates the momentum direction: |
506 | // 1. if only a EMC RecPoint, direction is given by IP and this RecPoint |
507 | // 2. if a EMC RecPoint and CPV RecPoint, direction is given by the line through the 2 recpoints |
508 | // However because of the poor position resolution of PPSD the direction is always taken as if we were |
509 | // in case 1. |
f0a4c9e9 |
510 | |
88cb7938 |
511 | TVector3 dir(0,0,0) ; |
9688c1dd |
512 | |
88cb7938 |
513 | TVector3 emcglobalpos ; |
514 | TMatrix dummy ; |
bf8f1fbd |
515 | |
88cb7938 |
516 | emc->GetGlobalPosition(emcglobalpos, dummy) ; |
bf8f1fbd |
517 | |
fbf811ec |
518 | |
88cb7938 |
519 | dir = emcglobalpos ; |
88cb7938 |
520 | dir.SetMag(1.) ; |
e3817e5f |
521 | |
88cb7938 |
522 | //account correction to the position of IP |
523 | Float_t xo,yo,zo ; //Coordinates of the origin |
524 | gAlice->Generator()->GetOrigin(xo,yo,zo) ; |
525 | TVector3 origin(xo,yo,zo); |
526 | dir = dir - origin ; |
e3817e5f |
527 | |
88cb7938 |
528 | return dir ; |
7b7c1533 |
529 | } |
530 | |
7acf6008 |
531 | //____________________________________________________________________________ |
e3817e5f |
532 | void AliPHOSPIDv1::MakeRecParticles() |
533 | { |
b2a60966 |
534 | // Makes a RecParticle out of a TrackSegment |
148b2bba |
535 | |
88cb7938 |
536 | AliPHOSGetter * gime = AliPHOSGetter::Instance() ; |
fbf811ec |
537 | TObjArray * emcRecPoints = gime->EmcRecPoints() ; |
538 | TObjArray * cpvRecPoints = gime->CpvRecPoints() ; |
539 | TClonesArray * trackSegments = gime->TrackSegments() ; |
148b2bba |
540 | if ( !emcRecPoints || !cpvRecPoints || !trackSegments ) { |
f1611b7c |
541 | Fatal("MakeRecParticles", "RecPoints or TrackSegments not found !") ; |
148b2bba |
542 | } |
fbf811ec |
543 | TClonesArray * recParticles = gime->RecParticles() ; |
01a599c9 |
544 | recParticles->Clear(); |
148b2bba |
545 | |
7b7c1533 |
546 | TIter next(trackSegments) ; |
7acf6008 |
547 | AliPHOSTrackSegment * ts ; |
6ad0bfa0 |
548 | Int_t index = 0 ; |
09fc14a0 |
549 | AliPHOSRecParticle * rp ; |
7acf6008 |
550 | while ( (ts = (AliPHOSTrackSegment *)next()) ) { |
fad3e5b9 |
551 | |
7b7c1533 |
552 | new( (*recParticles)[index] ) AliPHOSRecParticle() ; |
553 | rp = (AliPHOSRecParticle *)recParticles->At(index) ; |
f0a4c9e9 |
554 | rp->SetTrackSegment(index) ; |
9688c1dd |
555 | rp->SetIndexInList(index) ; |
148b2bba |
556 | |
7acf6008 |
557 | AliPHOSEmcRecPoint * emc = 0 ; |
558 | if(ts->GetEmcIndex()>=0) |
7b7c1533 |
559 | emc = (AliPHOSEmcRecPoint *) emcRecPoints->At(ts->GetEmcIndex()) ; |
fad3e5b9 |
560 | |
8d4608b5 |
561 | AliPHOSCpvRecPoint * cpv = 0 ; |
7acf6008 |
562 | if(ts->GetCpvIndex()>=0) |
8d4608b5 |
563 | cpv = (AliPHOSCpvRecPoint *) cpvRecPoints->At(ts->GetCpvIndex()) ; |
fad3e5b9 |
564 | |
148b2bba |
565 | // Now set type (reconstructed) of the particle |
566 | |
567 | // Choose the cluster energy range |
9fa5f1d0 |
568 | |
fbf811ec |
569 | if (!emc) { |
f1611b7c |
570 | Fatal("MakeRecParticles", "-> emc(%d) = %d", ts->GetEmcIndex(), emc ) ; |
fbf811ec |
571 | } |
50739f15 |
572 | |
e3817e5f |
573 | Float_t e = emc->GetEnergy() ; |
bc0c084c |
574 | |
6f969528 |
575 | Float_t lambda[2] ; |
576 | emc->GetElipsAxis(lambda) ; |
50739f15 |
577 | |
578 | if((lambda[0]>0.01) && (lambda[1]>0.01)){ |
579 | // Looking PCA. Define and calculate the data (X), |
bc0c084c |
580 | // introduce in the function X2P that gives the components (P). |
581 | |
e3817e5f |
582 | Float_t Spher = 0. ; |
583 | Float_t Emaxdtotal = 0. ; |
50739f15 |
584 | |
bc0c084c |
585 | if((lambda[0]+lambda[1])!=0) |
e3817e5f |
586 | Spher=fabs(lambda[0]-lambda[1])/(lambda[0]+lambda[1]); |
50739f15 |
587 | |
e3817e5f |
588 | Emaxdtotal=emc->GetMaximalEnergy()/emc->GetEnergy(); |
50739f15 |
589 | |
590 | fX[0] = lambda[0] ; |
591 | fX[1] = lambda[1] ; |
592 | fX[2] = emc->GetDispersion() ; |
e3817e5f |
593 | fX[3] = Spher ; |
50739f15 |
594 | fX[4] = emc->GetMultiplicity() ; |
e3817e5f |
595 | fX[5] = Emaxdtotal ; |
50739f15 |
596 | fX[6] = emc->GetCoreEnergy() ; |
597 | |
e3817e5f |
598 | fPrincipalPhoton->X2P(fX,fPPhoton); |
599 | fPrincipalPi0 ->X2P(fX,fPPi0); |
1f0e7ccd |
600 | |
50739f15 |
601 | } |
602 | else{ |
e3817e5f |
603 | fPPhoton[0]=-100.0; //We do not accept clusters with |
604 | fPPhoton[1]=-100.0; //one cell as a photon-like |
605 | fPPi0[0] =-100.0; |
606 | fPPi0[1] =-100.0; |
50739f15 |
607 | } |
608 | |
6f969528 |
609 | Float_t time =emc->GetTime() ; |
9fa5f1d0 |
610 | |
bc0c084c |
611 | // Loop of Efficiency-Purity (the 3 points of purity or efficiency |
612 | // are taken into account to set the particle identification) |
e3817e5f |
613 | for(Int_t effPur = 0; effPur < 3 ; effPur++){ |
50739f15 |
614 | |
bc0c084c |
615 | // Looking at the CPV detector. If RCPV greater than CpvEmcDistance, |
616 | // 1st,2nd or 3rd bit (depending on the efficiency-purity point ) |
617 | // is set to 1 |
e3817e5f |
618 | if(GetCPVBit(emc, cpv, effPur,e) == 1 ) |
619 | rp->SetPIDBit(effPur) ; |
f0a4c9e9 |
620 | |
50739f15 |
621 | // Looking the TOF. If TOF smaller than gate, 4th, 5th or 6th |
622 | // bit (depending on the efficiency-purity point )is set to 1 |
e3817e5f |
623 | if(time< (*fParameters)(2,effPur)) |
624 | rp->SetPIDBit(effPur+3) ; |
50739f15 |
625 | |
e3817e5f |
626 | //Photon PCA |
50739f15 |
627 | //If we are inside the ellipse, 7th, 8th or 9th |
628 | // bit (depending on the efficiency-purity point )is set to 1 |
e3817e5f |
629 | if(GetPrincipalBit("photon",fPPhoton,effPur,e) == 1) |
630 | rp->SetPIDBit(effPur+6) ; |
1f0e7ccd |
631 | |
e3817e5f |
632 | //Pi0 PCA |
1f0e7ccd |
633 | //If we are inside the ellipse, 10th, 11th or 12th |
634 | // bit (depending on the efficiency-purity point )is set to 1 |
e3817e5f |
635 | if(GetPrincipalBit("pi0" ,fPPi0 ,effPur,e) == 1) |
636 | rp->SetPIDBit(effPur+9) ; |
f0a4c9e9 |
637 | } |
e3817e5f |
638 | if(GetHardPhotonBit(emc)) |
639 | rp->SetPIDBit(12) ; |
640 | if(GetHardPi0Bit (emc)) |
641 | rp->SetPIDBit(13) ; |
1f0e7ccd |
642 | |
9fa5f1d0 |
643 | //Set momentum, energy and other parameters |
50739f15 |
644 | Float_t encal = GetCalibratedEnergy(e); |
9fa5f1d0 |
645 | TVector3 dir = GetMomentumDirection(emc,cpv) ; |
646 | dir.SetMag(encal) ; |
647 | rp->SetMomentum(dir.X(),dir.Y(),dir.Z(),encal) ; |
648 | rp->SetCalcMass(0); |
e0ed2e49 |
649 | rp->Name(); //If photon sets the particle pdg name to gamma |
e747b8da |
650 | rp->SetProductionVertex(0,0,0,0); |
651 | rp->SetFirstMother(-1); |
652 | rp->SetLastMother(-1); |
653 | rp->SetFirstDaughter(-1); |
654 | rp->SetLastDaughter(-1); |
655 | rp->SetPolarisation(0,0,0); |
d956e9b7 |
656 | //Set the position in global coordinate system from the RecPoint |
657 | AliPHOSGeometry * geom = gime->PHOSGeometry() ; |
658 | AliPHOSTrackSegment * ts = gime->TrackSegment(rp->GetPHOSTSIndex()) ; |
659 | AliPHOSEmcRecPoint * erp = gime->EmcRecPoint(ts->GetEmcIndex()) ; |
660 | TVector3 pos ; |
661 | geom->GetGlobal(erp, pos) ; |
662 | rp->SetPos(pos); |
663 | |
6ad0bfa0 |
664 | index++ ; |
665 | } |
6ad0bfa0 |
666 | } |
e3817e5f |
667 | |
09fc14a0 |
668 | //____________________________________________________________________________ |
88cb7938 |
669 | void AliPHOSPIDv1::Print() const |
09fc14a0 |
670 | { |
b2a60966 |
671 | // Print the parameters used for the particle type identification |
bc0c084c |
672 | |
88cb7938 |
673 | Info("Print", "=============== AliPHOSPIDv1 ================") ; |
674 | printf("Making PID\n") ; |
675 | printf(" Pricipal analysis file from 0.5 to 100 %s\n", fFileNamePrincipalPhoton.Data() ) ; |
676 | printf(" Name of parameters file %s\n", fFileNameParameters.Data() ) ; |
677 | printf(" Matrix of Parameters: 14x4\n") ; |
678 | printf(" Energy Calibration 1x3 [3 parametres to calibrate energy: A + B* E + C * E^2]\n") ; |
679 | printf(" RCPV 2x3 rows x and z, columns function cut parameters\n") ; |
680 | printf(" TOF 1x3 [High Eff-Low Pur,Medium Eff-Pur, Low Eff-High Pur]\n") ; |
681 | printf(" PCA 5x4 [5 ellipse parametres and 4 parametres to calculate them: A/Sqrt(E) + B* E + C * E^2 + D]\n") ; |
682 | Printf(" Pi0 PCA 5x3 [5 ellipse parametres and 3 parametres to calculate them: A + B* E + C * E^2]\n") ; |
50739f15 |
683 | fParameters->Print() ; |
09fc14a0 |
684 | } |
685 | |
a496c46c |
686 | |
69183710 |
687 | |
7acf6008 |
688 | //____________________________________________________________________________ |
a4e98857 |
689 | void AliPHOSPIDv1::PrintRecParticles(Option_t * option) |
690 | { |
dd5c4038 |
691 | // Print table of reconstructed particles |
692 | |
88cb7938 |
693 | AliPHOSGetter *gime = AliPHOSGetter::Instance() ; |
bf8f1fbd |
694 | |
88cb7938 |
695 | TClonesArray * recParticles = gime->RecParticles() ; |
21cd0c07 |
696 | |
697 | TString message ; |
3bf72d32 |
698 | message = "\nevent " ; |
699 | message += gAlice->GetEvNumber() ; |
700 | message += " found " ; |
701 | message += recParticles->GetEntriesFast(); |
702 | message += " RecParticles\n" ; |
703 | |
7acf6008 |
704 | if(strstr(option,"all")) { // printing found TS |
3bf72d32 |
705 | message += "\n PARTICLE Index \n" ; |
7acf6008 |
706 | |
707 | Int_t index ; |
7b7c1533 |
708 | for (index = 0 ; index < recParticles->GetEntries() ; index++) { |
21cd0c07 |
709 | AliPHOSRecParticle * rp = (AliPHOSRecParticle * ) recParticles->At(index) ; |
3bf72d32 |
710 | message += "\n" ; |
711 | message += rp->Name().Data() ; |
712 | message += " " ; |
713 | message += rp->GetIndexInList() ; |
714 | message += " " ; |
715 | message += rp->GetType() ; |
7acf6008 |
716 | } |
3bf72d32 |
717 | } |
718 | Info("Print", message.Data() ) ; |
69183710 |
719 | } |
88cb7938 |
720 | |
721 | //____________________________________________________________________________ |
722 | void AliPHOSPIDv1::SetParameters() |
723 | { |
724 | // PCA : To do the Principal Components Analysis it is necessary |
725 | // the Principal file, which is opened here |
726 | fX = new double[7]; // Data for the PCA |
727 | fPPhoton = new double[7]; // Eigenvalues of the PCA |
728 | fPPi0 = new double[7]; // Eigenvalues of the Pi0 PCA |
729 | |
730 | // Read photon principals from the photon file |
731 | |
732 | fFileNamePrincipalPhoton = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root" ; |
733 | TFile f( fFileNamePrincipalPhoton.Data(), "read" ) ; |
734 | fPrincipalPhoton = dynamic_cast<TPrincipal*> (f.Get("principal")) ; |
735 | f.Close() ; |
736 | |
737 | // Read pi0 principals from the pi0 file |
738 | |
739 | fFileNamePrincipalPi0 = "$ALICE_ROOT/PHOS/PCA_pi0_40-120.root" ; |
740 | TFile fPi0( fFileNamePrincipalPi0.Data(), "read" ) ; |
741 | fPrincipalPi0 = dynamic_cast<TPrincipal*> (fPi0.Get("principal")) ; |
742 | fPi0.Close() ; |
743 | |
744 | // Open parameters file and initialization of the Parameters matrix. |
745 | // In the File Parameters.dat are all the parameters. These are introduced |
746 | // in a matrix of 16x4 |
747 | // |
748 | // All the parameters defined in this file are, in order of row: |
749 | // line 0 : calibration |
750 | // lines 1,2 : CPV rectangular cat for X and Z |
751 | // line 3 : TOF cut |
752 | // lines 4-8 : parameters to calculate photon PCA ellipse |
753 | // lines 9-13: parameters to calculate pi0 PCA ellipse |
754 | // lines 14-15: parameters to calculate border for high-pt photons and pi0 |
755 | |
756 | fFileNameParameters = gSystem->ExpandPathName("$ALICE_ROOT/PHOS/Parameters.dat"); |
757 | fParameters = new TMatrix(16,4) ; |
758 | const Int_t maxLeng=255; |
759 | char string[maxLeng]; |
760 | |
761 | // Open a text file with PID parameters |
762 | FILE *fd = fopen(fFileNameParameters.Data(),"r"); |
763 | if (!fd) |
764 | Fatal("SetParameter","File %s with a PID parameters cannot be opened\n", |
765 | fFileNameParameters.Data()); |
766 | |
767 | Int_t i=0; |
768 | // Read parameter file line-by-line and skip empty line and comments |
769 | while (fgets(string,maxLeng,fd) != NULL) { |
770 | if (string[0] == '\n' ) continue; |
771 | if (string[0] == '!' ) continue; |
772 | sscanf(string, "%f %f %f %f", |
773 | &(*fParameters)(i,0), &(*fParameters)(i,1), |
774 | &(*fParameters)(i,2), &(*fParameters)(i,3)); |
775 | i++; |
776 | //printf("line %d: %s",i,string); |
777 | } |
778 | fclose(fd); |
779 | } |
780 | |
781 | //____________________________________________________________________________ |
782 | void AliPHOSPIDv1::SetParameterCalibration(Int_t i,Float_t param) |
783 | { |
784 | // Set parameter "Calibration" i to a value param |
785 | if(i>2 || i<0) |
786 | Error("SetParameterCalibration","Invalid parameter number: %d",i); |
787 | else |
788 | (*fParameters)(0,i) = param ; |
789 | } |
790 | |
791 | //____________________________________________________________________________ |
792 | void AliPHOSPIDv1::SetParameterCpv2Emc(Int_t i, TString axis, Float_t cut) |
793 | { |
794 | // Set the parameters to calculate Cpv-to-Emc Distance Cut depending on |
795 | // Purity-Efficiency point i |
796 | |
797 | if(i>2 || i<0) |
798 | Error("SetParameterCpv2Emc","Invalid parameter number: %d",i); |
799 | else { |
800 | axis.ToLower(); |
801 | if (axis == "x") (*fParameters)(1,i) = cut; |
802 | else if (axis == "z") (*fParameters)(2,i) = cut; |
803 | else Error("SetParameterCpv2Emc","Invalid axis name: %s",axis.Data()); |
804 | } |
805 | } |
806 | |
807 | //____________________________________________________________________________ |
808 | void AliPHOSPIDv1::SetParameterPhotonBoundary(Int_t i,Float_t param) |
809 | { |
810 | // Set parameter "Hard photon boundary" i to a value param |
811 | if(i>4 || i<0) |
812 | Error("SetParameterPhotonBoundary","Invalid parameter number: %d",i); |
813 | else |
814 | (*fParameters)(14,i) = param ; |
815 | } |
816 | |
817 | //____________________________________________________________________________ |
818 | void AliPHOSPIDv1::SetParameterPi0Boundary(Int_t i,Float_t param) |
819 | { |
820 | // Set parameter "Hard pi0 boundary" i to a value param |
821 | if(i>1 || i<0) |
822 | Error("SetParameterPi0Boundary","Invalid parameter number: %d",i); |
823 | else |
824 | (*fParameters)(15,i) = param ; |
825 | } |
826 | |
827 | //_____________________________________________________________________________ |
828 | void AliPHOSPIDv1::SetParameterTimeGate(Int_t i, Float_t gate) |
829 | { |
830 | // Set the parameter TimeGate depending on Purity-Efficiency point i |
831 | if (i>2 || i<0) |
832 | Error("SetParameterTimeGate","Invalid Efficiency-Purity choice %d",i); |
833 | else |
834 | (*fParameters)(3,i)= gate ; |
835 | } |
836 | |
837 | //_____________________________________________________________________________ |
838 | void AliPHOSPIDv1::SetParameterToCalculateEllipse(TString particle, TString param, Int_t i, Float_t par) |
839 | { |
840 | // Set the parameter "i" that is needed to calculate the ellipse |
841 | // parameter "param" for a particle "particle" |
842 | |
843 | particle.ToLower(); |
844 | param. ToLower(); |
845 | Int_t p= -1; |
846 | Int_t offset=0; |
847 | |
848 | if (particle == "photon") offset=0; |
849 | else if (particle == "pi0") offset=5; |
850 | else |
851 | Error("SetParameterToCalculateEllipse","Wrong particle name: %s (choose from pi0/photon)\n",particle.Data()); |
852 | |
853 | if (param.Contains("a")) p=4+offset; |
854 | else if(param.Contains("b")) p=5+offset; |
855 | else if(param.Contains("c")) p=6+offset; |
856 | else if(param.Contains("x0"))p=7+offset; |
857 | else if(param.Contains("y0"))p=8+offset; |
858 | if((i>4)||(i<0)) |
859 | Error("SetEllipseParameter", "No parameter with index %d", i) ; |
860 | else if(p==-1) |
861 | Error("SetEllipseParameter", "No parameter with name %s", param.Data() ) ; |
862 | else |
863 | (*fParameters)(p,i) = par ; |
864 | } |
865 | |
866 | //____________________________________________________________________________ |
867 | void AliPHOSPIDv1::Unload() |
868 | { |
869 | AliPHOSGetter * gime = AliPHOSGetter::Instance() ; |
870 | gime->PhosLoader()->UnloadRecPoints() ; |
871 | gime->PhosLoader()->UnloadTracks() ; |
872 | gime->PhosLoader()->UnloadRecParticles() ; |
873 | } |
874 | |
875 | //____________________________________________________________________________ |
90cceaf6 |
876 | void AliPHOSPIDv1::WriteRecParticles() |
88cb7938 |
877 | { |
878 | |
879 | AliPHOSGetter *gime = AliPHOSGetter::Instance() ; |
880 | |
881 | TClonesArray * recParticles = gime->RecParticles() ; |
882 | recParticles->Expand(recParticles->GetEntriesFast() ) ; |
883 | TTree * treeP = gime->TreeP(); |
884 | |
885 | //First rp |
886 | Int_t bufferSize = 32000 ; |
887 | TBranch * rpBranch = treeP->Branch("PHOSRP",&recParticles,bufferSize); |
888 | rpBranch->SetTitle(BranchName()); |
889 | |
890 | rpBranch->Fill() ; |
891 | |
892 | gime->WriteRecParticles("OVERWRITE"); |
893 | gime->WritePID("OVERWRITE"); |
894 | } |
895 | |